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"Hunting For Toxic Chemicals in Donna"

"DONNA — The source of the toxic chemicals in the fish of the Donna Canal and reservoir is still a mystery almost 20 years after the U.S. Environmental Protection Agency started looking. But residents of the South Texas town of Donna are still eating the fish laden with PCBs despite a ban and warning signs along the canal."

"The EPA is now overseeing its largest and most comprehensive search in the canal system for PCBs, or polychlorinated biphenyls, cancer-causing chemicals that were used in industrial equipment until they were banned."